These definitions are used throughout the remainder of this manual.
POSIX
blank
builtin
control operator
word
that performs a control function. It is a newline
or one of the following:
`||', `&&', `&', `;', `;;',
`|', `(', or `)'.
exit status
field
filename
job
job control
metacharacter
blank
or one of the following characters:
`|', `&', `;', `(', `)', `<', or
`>'.
name
word
consisting solely of letters, numbers, and underscores,
and beginning with a letter or underscore. Name
s are used as
shell variable and function names.
Also referred to as an identifier
.
operator
control operator
or a redirection operator
.
See section Redirections, for a list of redirection operators.
process group
process group ID
process group
during its lifetime.
reserved word
word
that has a special meaning to the shell. Most reserved
words introduce shell flow control constructs, such as for
and
while
.
return status
exit status
.
signal
special builtin
token
word
or an operator
.
word
token
that is not an operator
.
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